Merge branch 'cy/completion-typofix'
[git] / builtin / fsck.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "repository.h"
4 #include "config.h"
5 #include "commit.h"
6 #include "tree.h"
7 #include "blob.h"
8 #include "tag.h"
9 #include "refs.h"
10 #include "pack.h"
11 #include "cache-tree.h"
12 #include "tree-walk.h"
13 #include "fsck.h"
14 #include "parse-options.h"
15 #include "dir.h"
16 #include "progress.h"
17 #include "streaming.h"
18 #include "decorate.h"
19 #include "packfile.h"
20 #include "object-store.h"
21 #include "run-command.h"
22 #include "worktree.h"
23
24 #define REACHABLE 0x0001
25 #define SEEN      0x0002
26 #define HAS_OBJ   0x0004
27 /* This flag is set if something points to this object. */
28 #define USED      0x0008
29
30 static int show_root;
31 static int show_tags;
32 static int show_unreachable;
33 static int include_reflogs = 1;
34 static int check_full = 1;
35 static int connectivity_only;
36 static int check_strict;
37 static int keep_cache_objects;
38 static struct fsck_options fsck_walk_options = FSCK_OPTIONS_DEFAULT;
39 static struct fsck_options fsck_obj_options = FSCK_OPTIONS_DEFAULT;
40 static int errors_found;
41 static int write_lost_and_found;
42 static int verbose;
43 static int show_progress = -1;
44 static int show_dangling = 1;
45 static int name_objects;
46 #define ERROR_OBJECT 01
47 #define ERROR_REACHABLE 02
48 #define ERROR_PACK 04
49 #define ERROR_REFS 010
50 #define ERROR_COMMIT_GRAPH 020
51
52 static const char *describe_object(struct object *obj)
53 {
54         static struct strbuf bufs[] = {
55                 STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT
56         };
57         static int b = 0;
58         struct strbuf *buf;
59         char *name = NULL;
60
61         if (name_objects)
62                 name = lookup_decoration(fsck_walk_options.object_names, obj);
63
64         buf = bufs + b;
65         b = (b + 1) % ARRAY_SIZE(bufs);
66         strbuf_reset(buf);
67         strbuf_addstr(buf, oid_to_hex(&obj->oid));
68         if (name)
69                 strbuf_addf(buf, " (%s)", name);
70
71         return buf->buf;
72 }
73
74 static const char *printable_type(struct object *obj)
75 {
76         const char *ret;
77
78         if (obj->type == OBJ_NONE) {
79                 enum object_type type = oid_object_info(the_repository,
80                                                         &obj->oid, NULL);
81                 if (type > 0)
82                         object_as_type(the_repository, obj, type, 0);
83         }
84
85         ret = type_name(obj->type);
86         if (!ret)
87                 ret = _("unknown");
88
89         return ret;
90 }
91
92 static int fsck_config(const char *var, const char *value, void *cb)
93 {
94         if (strcmp(var, "fsck.skiplist") == 0) {
95                 const char *path;
96                 struct strbuf sb = STRBUF_INIT;
97
98                 if (git_config_pathname(&path, var, value))
99                         return 1;
100                 strbuf_addf(&sb, "skiplist=%s", path);
101                 free((char *)path);
102                 fsck_set_msg_types(&fsck_obj_options, sb.buf);
103                 strbuf_release(&sb);
104                 return 0;
105         }
106
107         if (skip_prefix(var, "fsck.", &var)) {
108                 fsck_set_msg_type(&fsck_obj_options, var, value);
109                 return 0;
110         }
111
112         return git_default_config(var, value, cb);
113 }
114
115 static int objerror(struct object *obj, const char *err)
116 {
117         errors_found |= ERROR_OBJECT;
118         /* TRANSLATORS: e.g. error in tree 01bfda: <more explanation> */
119         fprintf_ln(stderr, _("error in %s %s: %s"),
120                    printable_type(obj), describe_object(obj), err);
121         return -1;
122 }
123
124 static int fsck_error_func(struct fsck_options *o,
125         struct object *obj, int type, const char *message)
126 {
127         switch (type) {
128         case FSCK_WARN:
129                 /* TRANSLATORS: e.g. warning in tree 01bfda: <more explanation> */
130                 fprintf_ln(stderr, _("warning in %s %s: %s"),
131                            printable_type(obj), describe_object(obj), message);
132                 return 0;
133         case FSCK_ERROR:
134                 /* TRANSLATORS: e.g. error in tree 01bfda: <more explanation> */
135                 fprintf_ln(stderr, _("error in %s %s: %s"),
136                            printable_type(obj), describe_object(obj), message);
137                 return 1;
138         default:
139                 BUG("%d (FSCK_IGNORE?) should never trigger this callback", type);
140         }
141 }
142
143 static struct object_array pending;
144
145 static int mark_object(struct object *obj, int type, void *data, struct fsck_options *options)
146 {
147         struct object *parent = data;
148
149         /*
150          * The only case data is NULL or type is OBJ_ANY is when
151          * mark_object_reachable() calls us.  All the callers of
152          * that function has non-NULL obj hence ...
153          */
154         if (!obj) {
155                 /* ... these references to parent->fld are safe here */
156                 printf_ln(_("broken link from %7s %s"),
157                           printable_type(parent), describe_object(parent));
158                 printf_ln(_("broken link from %7s %s"),
159                           (type == OBJ_ANY ? _("unknown") : type_name(type)),
160                           _("unknown"));
161                 errors_found |= ERROR_REACHABLE;
162                 return 1;
163         }
164
165         if (type != OBJ_ANY && obj->type != type)
166                 /* ... and the reference to parent is safe here */
167                 objerror(parent, _("wrong object type in link"));
168
169         if (obj->flags & REACHABLE)
170                 return 0;
171         obj->flags |= REACHABLE;
172
173         if (is_promisor_object(&obj->oid))
174                 /*
175                  * Further recursion does not need to be performed on this
176                  * object since it is a promisor object (so it does not need to
177                  * be added to "pending").
178                  */
179                 return 0;
180
181         if (!(obj->flags & HAS_OBJ)) {
182                 if (parent && !has_object_file(&obj->oid)) {
183                         printf_ln(_("broken link from %7s %s\n"
184                                     "              to %7s %s"),
185                                   printable_type(parent),
186                                   describe_object(parent),
187                                   printable_type(obj),
188                                   describe_object(obj));
189                         errors_found |= ERROR_REACHABLE;
190                 }
191                 return 1;
192         }
193
194         add_object_array(obj, NULL, &pending);
195         return 0;
196 }
197
198 static void mark_object_reachable(struct object *obj)
199 {
200         mark_object(obj, OBJ_ANY, NULL, NULL);
201 }
202
203 static int traverse_one_object(struct object *obj)
204 {
205         int result = fsck_walk(obj, obj, &fsck_walk_options);
206
207         if (obj->type == OBJ_TREE) {
208                 struct tree *tree = (struct tree *)obj;
209                 free_tree_buffer(tree);
210         }
211         return result;
212 }
213
214 static int traverse_reachable(void)
215 {
216         struct progress *progress = NULL;
217         unsigned int nr = 0;
218         int result = 0;
219         if (show_progress)
220                 progress = start_delayed_progress(_("Checking connectivity"), 0);
221         while (pending.nr) {
222                 result |= traverse_one_object(object_array_pop(&pending));
223                 display_progress(progress, ++nr);
224         }
225         stop_progress(&progress);
226         return !!result;
227 }
228
229 static int mark_used(struct object *obj, int type, void *data, struct fsck_options *options)
230 {
231         if (!obj)
232                 return 1;
233         obj->flags |= USED;
234         return 0;
235 }
236
237 /*
238  * Check a single reachable object
239  */
240 static void check_reachable_object(struct object *obj)
241 {
242         /*
243          * We obviously want the object to be parsed,
244          * except if it was in a pack-file and we didn't
245          * do a full fsck
246          */
247         if (!(obj->flags & HAS_OBJ)) {
248                 if (is_promisor_object(&obj->oid))
249                         return;
250                 if (has_object_pack(&obj->oid))
251                         return; /* it is in pack - forget about it */
252                 printf_ln(_("missing %s %s"), printable_type(obj),
253                           describe_object(obj));
254                 errors_found |= ERROR_REACHABLE;
255                 return;
256         }
257 }
258
259 /*
260  * Check a single unreachable object
261  */
262 static void check_unreachable_object(struct object *obj)
263 {
264         /*
265          * Missing unreachable object? Ignore it. It's not like
266          * we miss it (since it can't be reached), nor do we want
267          * to complain about it being unreachable (since it does
268          * not exist).
269          */
270         if (!(obj->flags & HAS_OBJ))
271                 return;
272
273         /*
274          * Unreachable object that exists? Show it if asked to,
275          * since this is something that is prunable.
276          */
277         if (show_unreachable) {
278                 printf_ln(_("unreachable %s %s"), printable_type(obj),
279                           describe_object(obj));
280                 return;
281         }
282
283         /*
284          * "!USED" means that nothing at all points to it, including
285          * other unreachable objects. In other words, it's the "tip"
286          * of some set of unreachable objects, usually a commit that
287          * got dropped.
288          *
289          * Such starting points are more interesting than some random
290          * set of unreachable objects, so we show them even if the user
291          * hasn't asked for _all_ unreachable objects. If you have
292          * deleted a branch by mistake, this is a prime candidate to
293          * start looking at, for example.
294          */
295         if (!(obj->flags & USED)) {
296                 if (show_dangling)
297                         printf_ln(_("dangling %s %s"), printable_type(obj),
298                                   describe_object(obj));
299                 if (write_lost_and_found) {
300                         char *filename = git_pathdup("lost-found/%s/%s",
301                                 obj->type == OBJ_COMMIT ? "commit" : "other",
302                                 describe_object(obj));
303                         FILE *f;
304
305                         if (safe_create_leading_directories_const(filename)) {
306                                 error(_("could not create lost-found"));
307                                 free(filename);
308                                 return;
309                         }
310                         f = xfopen(filename, "w");
311                         if (obj->type == OBJ_BLOB) {
312                                 if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
313                                         die_errno(_("could not write '%s'"), filename);
314                         } else
315                                 fprintf(f, "%s\n", describe_object(obj));
316                         if (fclose(f))
317                                 die_errno(_("could not finish '%s'"),
318                                           filename);
319                         free(filename);
320                 }
321                 return;
322         }
323
324         /*
325          * Otherwise? It's there, it's unreachable, and some other unreachable
326          * object points to it. Ignore it - it's not interesting, and we showed
327          * all the interesting cases above.
328          */
329 }
330
331 static void check_object(struct object *obj)
332 {
333         if (verbose)
334                 fprintf_ln(stderr, _("Checking %s"), describe_object(obj));
335
336         if (obj->flags & REACHABLE)
337                 check_reachable_object(obj);
338         else
339                 check_unreachable_object(obj);
340 }
341
342 static void check_connectivity(void)
343 {
344         int i, max;
345
346         /* Traverse the pending reachable objects */
347         traverse_reachable();
348
349         /* Look up all the requirements, warn about missing objects.. */
350         max = get_max_object_index();
351         if (verbose)
352                 fprintf_ln(stderr, _("Checking connectivity (%d objects)"), max);
353
354         for (i = 0; i < max; i++) {
355                 struct object *obj = get_indexed_object(i);
356
357                 if (obj)
358                         check_object(obj);
359         }
360 }
361
362 static int fsck_obj(struct object *obj, void *buffer, unsigned long size)
363 {
364         int err;
365
366         if (obj->flags & SEEN)
367                 return 0;
368         obj->flags |= SEEN;
369
370         if (verbose)
371                 fprintf_ln(stderr, _("Checking %s %s"),
372                            printable_type(obj), describe_object(obj));
373
374         if (fsck_walk(obj, NULL, &fsck_obj_options))
375                 objerror(obj, _("broken links"));
376         err = fsck_object(obj, buffer, size, &fsck_obj_options);
377         if (err)
378                 goto out;
379
380         if (obj->type == OBJ_COMMIT) {
381                 struct commit *commit = (struct commit *) obj;
382
383                 if (!commit->parents && show_root)
384                         printf_ln(_("root %s"),
385                                   describe_object(&commit->object));
386         }
387
388         if (obj->type == OBJ_TAG) {
389                 struct tag *tag = (struct tag *) obj;
390
391                 if (show_tags && tag->tagged) {
392                         printf_ln(_("tagged %s %s (%s) in %s"),
393                                   printable_type(tag->tagged),
394                                   describe_object(tag->tagged),
395                                   tag->tag,
396                                   describe_object(&tag->object));
397                 }
398         }
399
400 out:
401         if (obj->type == OBJ_TREE)
402                 free_tree_buffer((struct tree *)obj);
403         if (obj->type == OBJ_COMMIT)
404                 free_commit_buffer((struct commit *)obj);
405         return err;
406 }
407
408 static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
409                            unsigned long size, void *buffer, int *eaten)
410 {
411         /*
412          * Note, buffer may be NULL if type is OBJ_BLOB. See
413          * verify_packfile(), data_valid variable for details.
414          */
415         struct object *obj;
416         obj = parse_object_buffer(the_repository, oid, type, size, buffer,
417                                   eaten);
418         if (!obj) {
419                 errors_found |= ERROR_OBJECT;
420                 return error(_("%s: object corrupt or missing"),
421                              oid_to_hex(oid));
422         }
423         obj->flags &= ~(REACHABLE | SEEN);
424         obj->flags |= HAS_OBJ;
425         return fsck_obj(obj, buffer, size);
426 }
427
428 static int default_refs;
429
430 static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
431         timestamp_t timestamp)
432 {
433         struct object *obj;
434
435         if (!is_null_oid(oid)) {
436                 obj = lookup_object(the_repository, oid->hash);
437                 if (obj && (obj->flags & HAS_OBJ)) {
438                         if (timestamp && name_objects)
439                                 add_decoration(fsck_walk_options.object_names,
440                                         obj,
441                                         xstrfmt("%s@{%"PRItime"}", refname, timestamp));
442                         obj->flags |= USED;
443                         mark_object_reachable(obj);
444                 } else if (!is_promisor_object(oid)) {
445                         error(_("%s: invalid reflog entry %s"),
446                               refname, oid_to_hex(oid));
447                         errors_found |= ERROR_REACHABLE;
448                 }
449         }
450 }
451
452 static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
453                 const char *email, timestamp_t timestamp, int tz,
454                 const char *message, void *cb_data)
455 {
456         const char *refname = cb_data;
457
458         if (verbose)
459                 fprintf_ln(stderr, _("Checking reflog %s->%s"),
460                            oid_to_hex(ooid), oid_to_hex(noid));
461
462         fsck_handle_reflog_oid(refname, ooid, 0);
463         fsck_handle_reflog_oid(refname, noid, timestamp);
464         return 0;
465 }
466
467 static int fsck_handle_reflog(const char *logname, const struct object_id *oid,
468                               int flag, void *cb_data)
469 {
470         struct strbuf refname = STRBUF_INIT;
471
472         strbuf_worktree_ref(cb_data, &refname, logname);
473         for_each_reflog_ent(refname.buf, fsck_handle_reflog_ent, refname.buf);
474         strbuf_release(&refname);
475         return 0;
476 }
477
478 static int fsck_handle_ref(const char *refname, const struct object_id *oid,
479                            int flag, void *cb_data)
480 {
481         struct object *obj;
482
483         obj = parse_object(the_repository, oid);
484         if (!obj) {
485                 if (is_promisor_object(oid)) {
486                         /*
487                          * Increment default_refs anyway, because this is a
488                          * valid ref.
489                          */
490                          default_refs++;
491                          return 0;
492                 }
493                 error(_("%s: invalid sha1 pointer %s"),
494                       refname, oid_to_hex(oid));
495                 errors_found |= ERROR_REACHABLE;
496                 /* We'll continue with the rest despite the error.. */
497                 return 0;
498         }
499         if (obj->type != OBJ_COMMIT && is_branch(refname)) {
500                 error(_("%s: not a commit"), refname);
501                 errors_found |= ERROR_REFS;
502         }
503         default_refs++;
504         obj->flags |= USED;
505         if (name_objects)
506                 add_decoration(fsck_walk_options.object_names,
507                         obj, xstrdup(refname));
508         mark_object_reachable(obj);
509
510         return 0;
511 }
512
513 static int fsck_head_link(const char *head_ref_name,
514                           const char **head_points_at,
515                           struct object_id *head_oid);
516
517 static void get_default_heads(void)
518 {
519         struct worktree **worktrees, **p;
520         const char *head_points_at;
521         struct object_id head_oid;
522
523         for_each_rawref(fsck_handle_ref, NULL);
524
525         worktrees = get_worktrees(0);
526         for (p = worktrees; *p; p++) {
527                 struct worktree *wt = *p;
528                 struct strbuf ref = STRBUF_INIT;
529
530                 strbuf_worktree_ref(wt, &ref, "HEAD");
531                 fsck_head_link(ref.buf, &head_points_at, &head_oid);
532                 if (head_points_at && !is_null_oid(&head_oid))
533                         fsck_handle_ref(ref.buf, &head_oid, 0, NULL);
534                 strbuf_release(&ref);
535
536                 if (include_reflogs)
537                         refs_for_each_reflog(get_worktree_ref_store(wt),
538                                              fsck_handle_reflog, wt);
539         }
540         free_worktrees(worktrees);
541
542         /*
543          * Not having any default heads isn't really fatal, but
544          * it does mean that "--unreachable" no longer makes any
545          * sense (since in this case everything will obviously
546          * be unreachable by definition.
547          *
548          * Showing dangling objects is valid, though (as those
549          * dangling objects are likely lost heads).
550          *
551          * So we just print a warning about it, and clear the
552          * "show_unreachable" flag.
553          */
554         if (!default_refs) {
555                 fprintf_ln(stderr, _("notice: No default references"));
556                 show_unreachable = 0;
557         }
558 }
559
560 static int fsck_loose(const struct object_id *oid, const char *path, void *data)
561 {
562         struct object *obj;
563         enum object_type type;
564         unsigned long size;
565         void *contents;
566         int eaten;
567
568         if (read_loose_object(path, oid, &type, &size, &contents) < 0) {
569                 errors_found |= ERROR_OBJECT;
570                 error(_("%s: object corrupt or missing: %s"),
571                       oid_to_hex(oid), path);
572                 return 0; /* keep checking other objects */
573         }
574
575         if (!contents && type != OBJ_BLOB)
576                 BUG("read_loose_object streamed a non-blob");
577
578         obj = parse_object_buffer(the_repository, oid, type, size,
579                                   contents, &eaten);
580
581         if (!obj) {
582                 errors_found |= ERROR_OBJECT;
583                 error(_("%s: object could not be parsed: %s"),
584                       oid_to_hex(oid), path);
585                 if (!eaten)
586                         free(contents);
587                 return 0; /* keep checking other objects */
588         }
589
590         obj->flags &= ~(REACHABLE | SEEN);
591         obj->flags |= HAS_OBJ;
592         if (fsck_obj(obj, contents, size))
593                 errors_found |= ERROR_OBJECT;
594
595         if (!eaten)
596                 free(contents);
597         return 0; /* keep checking other objects, even if we saw an error */
598 }
599
600 static int fsck_cruft(const char *basename, const char *path, void *data)
601 {
602         if (!starts_with(basename, "tmp_obj_"))
603                 fprintf_ln(stderr, _("bad sha1 file: %s"), path);
604         return 0;
605 }
606
607 static int fsck_subdir(unsigned int nr, const char *path, void *progress)
608 {
609         display_progress(progress, nr + 1);
610         return 0;
611 }
612
613 static void fsck_object_dir(const char *path)
614 {
615         struct progress *progress = NULL;
616
617         if (verbose)
618                 fprintf_ln(stderr, _("Checking object directory"));
619
620         if (show_progress)
621                 progress = start_progress(_("Checking object directories"), 256);
622
623         for_each_loose_file_in_objdir(path, fsck_loose, fsck_cruft, fsck_subdir,
624                                       progress);
625         display_progress(progress, 256);
626         stop_progress(&progress);
627 }
628
629 static int fsck_head_link(const char *head_ref_name,
630                           const char **head_points_at,
631                           struct object_id *head_oid)
632 {
633         int null_is_error = 0;
634
635         if (verbose)
636                 fprintf_ln(stderr, _("Checking %s link"), head_ref_name);
637
638         *head_points_at = resolve_ref_unsafe(head_ref_name, 0, head_oid, NULL);
639         if (!*head_points_at) {
640                 errors_found |= ERROR_REFS;
641                 return error(_("invalid %s"), head_ref_name);
642         }
643         if (!strcmp(*head_points_at, head_ref_name))
644                 /* detached HEAD */
645                 null_is_error = 1;
646         else if (!starts_with(*head_points_at, "refs/heads/")) {
647                 errors_found |= ERROR_REFS;
648                 return error(_("%s points to something strange (%s)"),
649                              head_ref_name, *head_points_at);
650         }
651         if (is_null_oid(head_oid)) {
652                 if (null_is_error) {
653                         errors_found |= ERROR_REFS;
654                         return error(_("%s: detached HEAD points at nothing"),
655                                      head_ref_name);
656                 }
657                 fprintf_ln(stderr,
658                            _("notice: %s points to an unborn branch (%s)"),
659                            head_ref_name, *head_points_at + 11);
660         }
661         return 0;
662 }
663
664 static int fsck_cache_tree(struct cache_tree *it)
665 {
666         int i;
667         int err = 0;
668
669         if (verbose)
670                 fprintf_ln(stderr, _("Checking cache tree"));
671
672         if (0 <= it->entry_count) {
673                 struct object *obj = parse_object(the_repository, &it->oid);
674                 if (!obj) {
675                         error(_("%s: invalid sha1 pointer in cache-tree"),
676                               oid_to_hex(&it->oid));
677                         errors_found |= ERROR_REFS;
678                         return 1;
679                 }
680                 obj->flags |= USED;
681                 if (name_objects)
682                         add_decoration(fsck_walk_options.object_names,
683                                 obj, xstrdup(":"));
684                 mark_object_reachable(obj);
685                 if (obj->type != OBJ_TREE)
686                         err |= objerror(obj, _("non-tree in cache-tree"));
687         }
688         for (i = 0; i < it->subtree_nr; i++)
689                 err |= fsck_cache_tree(it->down[i]->cache_tree);
690         return err;
691 }
692
693 static void mark_object_for_connectivity(const struct object_id *oid)
694 {
695         struct object *obj = lookup_unknown_object(oid->hash);
696         obj->flags |= HAS_OBJ;
697 }
698
699 static int mark_loose_for_connectivity(const struct object_id *oid,
700                                        const char *path,
701                                        void *data)
702 {
703         mark_object_for_connectivity(oid);
704         return 0;
705 }
706
707 static int mark_packed_for_connectivity(const struct object_id *oid,
708                                         struct packed_git *pack,
709                                         uint32_t pos,
710                                         void *data)
711 {
712         mark_object_for_connectivity(oid);
713         return 0;
714 }
715
716 static char const * const fsck_usage[] = {
717         N_("git fsck [<options>] [<object>...]"),
718         NULL
719 };
720
721 static struct option fsck_opts[] = {
722         OPT__VERBOSE(&verbose, N_("be verbose")),
723         OPT_BOOL(0, "unreachable", &show_unreachable, N_("show unreachable objects")),
724         OPT_BOOL(0, "dangling", &show_dangling, N_("show dangling objects")),
725         OPT_BOOL(0, "tags", &show_tags, N_("report tags")),
726         OPT_BOOL(0, "root", &show_root, N_("report root nodes")),
727         OPT_BOOL(0, "cache", &keep_cache_objects, N_("make index objects head nodes")),
728         OPT_BOOL(0, "reflogs", &include_reflogs, N_("make reflogs head nodes (default)")),
729         OPT_BOOL(0, "full", &check_full, N_("also consider packs and alternate objects")),
730         OPT_BOOL(0, "connectivity-only", &connectivity_only, N_("check only connectivity")),
731         OPT_BOOL(0, "strict", &check_strict, N_("enable more strict checking")),
732         OPT_BOOL(0, "lost-found", &write_lost_and_found,
733                                 N_("write dangling objects in .git/lost-found")),
734         OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
735         OPT_BOOL(0, "name-objects", &name_objects, N_("show verbose names for reachable objects")),
736         OPT_END(),
737 };
738
739 int cmd_fsck(int argc, const char **argv, const char *prefix)
740 {
741         int i;
742         struct object_directory *odb;
743
744         /* fsck knows how to handle missing promisor objects */
745         fetch_if_missing = 0;
746
747         errors_found = 0;
748         read_replace_refs = 0;
749
750         argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
751
752         fsck_walk_options.walk = mark_object;
753         fsck_obj_options.walk = mark_used;
754         fsck_obj_options.error_func = fsck_error_func;
755         if (check_strict)
756                 fsck_obj_options.strict = 1;
757
758         if (show_progress == -1)
759                 show_progress = isatty(2);
760         if (verbose)
761                 show_progress = 0;
762
763         if (write_lost_and_found) {
764                 check_full = 1;
765                 include_reflogs = 0;
766         }
767
768         if (name_objects)
769                 fsck_walk_options.object_names =
770                         xcalloc(1, sizeof(struct decoration));
771
772         git_config(fsck_config, NULL);
773
774         if (connectivity_only) {
775                 for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
776                 for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
777         } else {
778                 prepare_alt_odb(the_repository);
779                 for (odb = the_repository->objects->odb; odb; odb = odb->next)
780                         fsck_object_dir(odb->path);
781
782                 if (check_full) {
783                         struct packed_git *p;
784                         uint32_t total = 0, count = 0;
785                         struct progress *progress = NULL;
786
787                         if (show_progress) {
788                                 for (p = get_all_packs(the_repository); p;
789                                      p = p->next) {
790                                         if (open_pack_index(p))
791                                                 continue;
792                                         total += p->num_objects;
793                                 }
794
795                                 progress = start_progress(_("Checking objects"), total);
796                         }
797                         for (p = get_all_packs(the_repository); p;
798                              p = p->next) {
799                                 /* verify gives error messages itself */
800                                 if (verify_pack(the_repository,
801                                                 p, fsck_obj_buffer,
802                                                 progress, count))
803                                         errors_found |= ERROR_PACK;
804                                 count += p->num_objects;
805                         }
806                         stop_progress(&progress);
807                 }
808
809                 if (fsck_finish(&fsck_obj_options))
810                         errors_found |= ERROR_OBJECT;
811         }
812
813         for (i = 0; i < argc; i++) {
814                 const char *arg = argv[i];
815                 struct object_id oid;
816                 if (!get_oid(arg, &oid)) {
817                         struct object *obj = lookup_object(the_repository,
818                                                            oid.hash);
819
820                         if (!obj || !(obj->flags & HAS_OBJ)) {
821                                 if (is_promisor_object(&oid))
822                                         continue;
823                                 error(_("%s: object missing"), oid_to_hex(&oid));
824                                 errors_found |= ERROR_OBJECT;
825                                 continue;
826                         }
827
828                         obj->flags |= USED;
829                         if (name_objects)
830                                 add_decoration(fsck_walk_options.object_names,
831                                         obj, xstrdup(arg));
832                         mark_object_reachable(obj);
833                         continue;
834                 }
835                 error(_("invalid parameter: expected sha1, got '%s'"), arg);
836                 errors_found |= ERROR_OBJECT;
837         }
838
839         /*
840          * If we've not been given any explicit head information, do the
841          * default ones from .git/refs. We also consider the index file
842          * in this case (ie this implies --cache).
843          */
844         if (!argc) {
845                 get_default_heads();
846                 keep_cache_objects = 1;
847         }
848
849         if (keep_cache_objects) {
850                 verify_index_checksum = 1;
851                 verify_ce_order = 1;
852                 read_cache();
853                 for (i = 0; i < active_nr; i++) {
854                         unsigned int mode;
855                         struct blob *blob;
856                         struct object *obj;
857
858                         mode = active_cache[i]->ce_mode;
859                         if (S_ISGITLINK(mode))
860                                 continue;
861                         blob = lookup_blob(the_repository,
862                                            &active_cache[i]->oid);
863                         if (!blob)
864                                 continue;
865                         obj = &blob->object;
866                         obj->flags |= USED;
867                         if (name_objects)
868                                 add_decoration(fsck_walk_options.object_names,
869                                         obj,
870                                         xstrfmt(":%s", active_cache[i]->name));
871                         mark_object_reachable(obj);
872                 }
873                 if (active_cache_tree)
874                         fsck_cache_tree(active_cache_tree);
875         }
876
877         check_connectivity();
878
879         if (!git_config_get_bool("core.commitgraph", &i) && i) {
880                 struct child_process commit_graph_verify = CHILD_PROCESS_INIT;
881                 const char *verify_argv[] = { "commit-graph", "verify", NULL, NULL, NULL };
882
883                 prepare_alt_odb(the_repository);
884                 for (odb = the_repository->objects->odb; odb; odb = odb->next) {
885                         child_process_init(&commit_graph_verify);
886                         commit_graph_verify.argv = verify_argv;
887                         commit_graph_verify.git_cmd = 1;
888                         verify_argv[2] = "--object-dir";
889                         verify_argv[3] = odb->path;
890                         if (run_command(&commit_graph_verify))
891                                 errors_found |= ERROR_COMMIT_GRAPH;
892                 }
893         }
894
895         if (!git_config_get_bool("core.multipackindex", &i) && i) {
896                 struct child_process midx_verify = CHILD_PROCESS_INIT;
897                 const char *midx_argv[] = { "multi-pack-index", "verify", NULL, NULL, NULL };
898
899                 prepare_alt_odb(the_repository);
900                 for (odb = the_repository->objects->odb; odb; odb = odb->next) {
901                         child_process_init(&midx_verify);
902                         midx_verify.argv = midx_argv;
903                         midx_verify.git_cmd = 1;
904                         midx_argv[2] = "--object-dir";
905                         midx_argv[3] = odb->path;
906                         if (run_command(&midx_verify))
907                                 errors_found |= ERROR_COMMIT_GRAPH;
908                 }
909         }
910
911         return errors_found;
912 }